Quiz Bank Exp 4

Quiz Bank Exp 4 - c. That are light (< 500MW) d. That...

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Quiz Bank for CHEM 6B Experiment 4 OH 1. BH 3 /THF 2. H 2 O 2 , NaOH 3. HCl, H 2 O + B(OH) 3 1. You analyzed your products on GC using a carbowax column. Which compound came off the column last? a. 1-octanol b. 2-octanol c. 3-octanol d. All of the above e. None of the above 2. What was the purpose of the attached drying tube in the Hydroboration-Oxidation lab? a. Prevents H 2 O from reacting with BH 3 b. Prevents O 2 from reacting with BH 3 c. Prevents H 2 O from reacting with H 2 O 2 d. Prevents O 2 from reacting with THF e. Prevents O 2 from reacting with NaOH 3. Which IR signal would indicate unreacted starting material? a. 3600 b. 3300 c. 3100 d. 2300 e. 1250
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4. In GC chromatography, the degree of separation depends upon: a. the column length b. the flow rate c. the boiling point of the compounds of interest d. All of the above e. None of the above 5. Normal phase FLASH chromatography is mostly used to separate compounds: a. That have more than 5-polar groups b. That have less than 5-polar groups, but more than 1
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Unformatted text preview: c. That are light (< 500MW) d. That are heavy (> 500MW) e. Flash always works with all types of carbon containing compounds 6. R f is equal to: a. The distance traveled by the solvent divided by the distance traveled by the substance b. The distance traveled by the substance divided by the distance traveled by the solvent c. The distance traveled by the solvent multiplied by the distance traveled by the substance d. The distance traveled by the substance multiplied by the distance traveled by the solvent 7. Which of the following is a method used to visualize a compound in TLC? a. UV light b. silica gel c. an I 2 stain d. all of the above e. a and c 8. Which of the following carbons is responsible for the peak further downfield (biggest number) in the 13 C-NMR. a. b. c. d. e....
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This note was uploaded on 04/07/2008 for the course CHEM 6b taught by Professor Pettus during the Spring '07 term at UCSB.

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Quiz Bank Exp 4 - c. That are light (< 500MW) d. That...

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